Related Clues:

• Do something wrong
• Commit 18-Down
• Knock off the track
• Wander off course, e.g.
• Flub it
• Knock off-track
• Betray fallibility
• Bungle the job
• Flub the shot, say
• Cause an unearned run
• Guess wrong
• Say the wrong thing
• Transpose digits, say
• Overcharge, e.g.
• Change from a course or standard